Ultra-low odor formulation designed for sensitive indoor environments and occupied spaces.
One-component, room-temperature vulcanizing (RTV) silicone with excellent adhesion to glass, aluminum, ceramics, and painted surfaces.
Non-corrosive cure chemistry—acetoxy-free, eliminating risk of metal corrosion and substrate damage.
Good resistance to UV exposure, thermal cycling, and humidity over extended service life.
Compliant with ASTM C920 Type S, Grade NS, Class 25, T1, NT, M, O for architectural sealants.
Architectural glazing systems including structural and perimeter bonding of insulating glass units.
Interior curtain wall and storefront assembly where low VOC and minimal odor are critical.
Sealing and bonding of aluminum composite panels (ACP) and metal cladding systems.
Fixing and sealing of bathroom and kitchen fixtures in commercial and residential fit-outs.
| Chemical Type | Acetoxy-cure silicone polymer |
| Product Form | Thixotropic paste, single-component |
| Appearance | Opaque white or translucent beige, smooth uniform consistency |
| Primary Applications | Architectural glazing, perimeter sealing, interior metal and glass bonding |
| Key Features | Ultra-low odor, non-corrosive, RTV at ambient conditions |
| Benefits | Occupant-safe installation, no post-cure ventilation required, reliable long-term durability |
| Cure Mechanism | Moisture-cured via atmospheric humidity |
| Shelf Life (unopened) | 12 months from date of manufacture when stored at ≤25°C in original sealed packaging |
Q1: What is the primary function of DOWSIL 7406-VLO in silicone adhesive formulations?
A: DOWSIL 7406-VLO is a low-viscosity, vinyl-terminated polydimethylsiloxane fluid designed to serve as a reactive diluent and viscosity modifier in addition-cure (platinum-catalyzed) silicone adhesives. It helps achieve optimal flow, wetting, and processing characteristics without compromising final crosslink density or thermal stability.
Q2: Is DOWSIL 7406-VLO compatible with standard platinum catalysts used in high-performance adhesive systems?
A: Yes — DOWSIL 7406-VLO is fully compatible with typical platinum-based catalysts used in addition-cure silicone systems. It contains reactive vinyl groups that participate efficiently in hydrosilylation reactions, supporting reliable cure kinetics and consistent bond formation across varied substrates.
Q3: How does DOWSIL 7406-VLO compare to higher-viscosity silicone fluids in terms of handling and formulation flexibility?
A: Its very low viscosity enables easy metering, homogeneous blending, and improved filler dispersion in adhesive formulations. Compared to higher-viscosity alternatives, it offers greater formulation latitude for achieving precise rheology targets — especially in demanding applications requiring gap-filling or conformal coating.
Q4: Can DOWSIL 7406-VLO be used in adhesives intended for electrical or electronic encapsulation?
A: Yes — due to its excellent dielectric properties, thermal stability, and compatibility with common encapsulation fillers and additives, DOWSIL 7406-VLO is frequently selected as a base fluid in silicone adhesives for electronic bonding, potting, and conformal coating applications where long-term reliability under thermal cycling is required.
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